Grandpa’s major secret
A released achievement explicitly points to Grandpa’s big secret under the Master XII wording, making it the clearest named secret thread.
Repeated and unusual NPC interactions
Wally, the strange-crown Cloudie, Palette and the Cloudie Guard pots all create hidden or easy-to-overlook interaction goals that fit a secret-cleanup pass.
World secrets vs collectible sets
Cards, kittens, music boxes and ingots have their own trackers. This page is for hidden interactions and unusual discoveries, not a duplicate “all collectibles” list.
Rumor rule
A secret is not published as fact just because it appears in a forum or video title. The page distinguishes confirmed achievement hooks from community speculation.
Core game facts are limited to the official Steam store/demo and official Steam news; achievement-specific scope is based on released platform achievement metadata.
Common questions
Does this page invent quest steps?+
No. It uses the confirmed character/location clue and adds exact route steps only after verification.
Where should I go for full progression?+
Use the main walkthrough for route order, then return here for the named entity or location.